...Robbie Goodhue; Geoff Clayton Abstract Palynomorph Darkness Index (PDI) is proposed as a new thermal maturity indicator. PDI is calculated from measurement of the red, green and blue (RGB) intensities of light transmitted through palynomorphs, using standard palynological microscopes and digital...

... abundant terrestrial phytoclasts palynomorphs and large amorphous organic matter of terrestrial origin. Spore/pollen thermal alteration colour ranges from light medium brown to dark brown indicative of mature oil generation and transition to dry gas phase. The thermal alteration index and vitrinite...

... Formation, updip Niger Delta basin to determine its palynofacies constituents and oil shale potential. The standard acid maceration technique, palynofacies description as well as palynomorph colour index chart systematically compared to thermal alteration index and vitrinite reflectance index values were...

..., production index (PI) ranges from 0.11-1.0. Unstructured organic matters are extracted through maceration techniques, which infer thermal maturity stages of the shales. The dark brown to black in colour of the studied palynomorphs extracted from the Rohtasgarh shales inferred strong thermal alternation...

.... Alongside the noticeable variation in the quality of preservation, a difference in the colour of preservation was observed. The palynomorph darkness index (PDI) ( Goodhue and Clayton 2010 ; Clayton et al. 2017 ) of non-taeniate bisaccate pollen grains from across the material described in Gibson...

... the Supplemental Material for additional details). Every fossil palynomorph was scored as corroded, degraded, and/or broken, following the terms of Cushing (1967) (Fig. S2). The classes are not mutually exclusive. Thermal maturity of grains was assessed using the palynomorph darkness index (PDI) of Goodhue...

... , Clayton G. 2010 . Palynomorph Darkness Index (PDI) – a new technique for assessing thermal maturity . Palynology . 34 ( 2 ): 147 – 156 . Kirk WDJ. 1994 . Recording the colours of pollen loads . Bee World . 75 ( 4 ): 169 – 180 . Kirk WDJ. 2006 . A colour guide...

...-11D7-8645000102C1865D . Goodhue , R. , and Clayton , G. , 2010 , Palynomorph darkness index (PDI)—A new technique for assessing thermal maturity : Palynology , v. 34 , p. 147 – 156 , https://doi.org/10.1080/01916121003696932 . Hessler , A.M. , Zhang , J. , Covault , J...

... silts and sand M 2 Dark brown (5Y 6/4) Silts with clay M 3 Black/dark grey (5Y 3/2) Silts with fine sticky clay M 4 Black/dark brown (5Y 4/2) Silts with fine to medium sand Ramannapalem R 1 Light brown (5Y 5/4) Silts with fine to medium sand R 2 Black/dark grey (5Y 3/2...

... been recovered from the dark shale (PT-1) occurring just below the youngest coal seam of the Raniganj Formation ( Fig. 2 ). The yield of palynomorphs from the sample PT-2 to PT-5 is extremely rare and not diversified, generally characterized by few forms of Striatopodocarpites sp., the other samples...

..., epidermal cells etc. of plants) and palynomorphs (spores and pollen). The productive samples studied from the bore hole clearly show the abundance of phytoclasts with subdominant palynomorphs in almost all samples. These phytoclasts are composed of dark brown to brown oxidized opaques and epidermal...

... is the transitional contact between the dark gray clay unit in the LA2-09 core (42.2–44.9 m) and the overlying lignite unit. Both dark colored units contain pyrite and have similar organic matter and palynomorph contents. The second palynomorph assemblage is found above 44.58 m in the LA2-09 core and the entire...

... on this topic is Goodhue and Clayton ( 2010 ) who proposed a novel measurement, the Palynomorph Darkness Index (PDI). This is a numerical scale from 0% (white) to 100% (black) using a simple formula involving the adjusted greyscale value (Ya). Modern digital cameras can be used to measure the red, green...

... abundance 96.4%) along with minor amounts of opaques and other terrestrial palynomorphs (Figure  3 ). The translucent phytoclasts exhibited light, dark, and very dark brown colors with irregular margins, abraded voids, and fractures. Degraded cuticular phytoclasts were not uncommon. Amorphous marine organic...

... the geological age of the rock that provided the sources of the oil. Correlations between palynomorphs in oils and those in rocks have been applied to determine geological ages and strato-horizons of petroleum source rocks. Thermal alteration index (TAI) based on spore/pollen colour was used to judge...

... into the basal Hettangian ( Warrington 1981 ; Hounslow et al. 2004 ). A rich organic residue, dominated by light brown, amorphous and structureless organic matter, but including a moderate number of palynomorphs, some dark brown, elongate woody phytoclasts, and sporadic remains of a colonial green alga...

... that was proposed by Helenes et al. (1998) to support the interpretation of depositional environments is calculated using the formula: Palynological Marine Index (PMI in %) = 100 x [(Rm/Rt) + 1] Rm is richness of marine palynomorphs (dinoflagellates cysts, acritarchs and foraminiferal test linings...

... of the wireline logs. The Torunos-1X well presents the main intervals in the Cretaceous section drilled and is used here as a model ( Figure 4 ). These intervals are as follows. Figure 4 —Palynomorph richness, palynological marine index (P.M.I.), gamma-ray (G.R.) log, systems tracts, and sedimentary...

... organic- walled microfossils, used as a general indicator of environment and in particular proximity to the shore; (2) an Inshore Index, based on the ratio between marine palynomorphs thought to be more abundant in nearshore environments and those forms regarded as more open sea or outer neritic...

... bentonite zone in lower Eagle Ford rocks illustrates the regional correlation value of palynomorphs in marine sediments. The appearance of a species of pollen from the genus Punctatricolporites roughly coincides with the Cenomanian-Turonian boundary in central Texas. The purpose of this investigation...